tree 4be800ea6e2e6ea7b985649c62a3a88841eb1720
parent 15bdbf1e189d998cb0f63772a456190cf85bc777
author Mathieu Chartier <mathieuc@google.com> 1529541941 -0700
committer Mathieu Chartier <mathieuc@google.com> 1529542088 -0700

Refactor WriteBarrier logic into its own file

Refactor write barrier logic to have the null check logic in the
barrier if possible.

Moved the logic into its own file.

Test: test-art-host

Change-Id: I8292cd7f01dbdddea7aeab6e01da4d309ab452fe